Home / 13,510.78-20,252.31-5,188.55

Finding the Fourth Proportional to 13,510.78, 20,252.31 and 5,188.55

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Solution

The fourth proportional to 13,510.78, 20,252.31 and 5,188.55 is: 7,777.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,510.78 : 20,252.31 = 5,188.55 : x
  2. Step 2: Convert to fraction form
    13,510.78/20,252.31 = 5,188.55/x
  3. Step 3: Cross multiply
    13,510.78x = 20,252.31 × 5,188.55
  4. Step 4: Simplify right side
    13,510.78x = 105,080,173.68
  5. Step 5: Solve for x
    x = 105,080,173.68/13,510.78
  6. Step 6: Final answer
    x = 7,777.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.